OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Implement HARD_REGNO_CALLER_SAVE_MODE for AArch64

Browse Source 
* config/aarch64/aarch64-protos.h
	(aarch64_hard_regno_caller_save_mode): New prototype.
	* config/aarch64/aarch64.c (aarch64_hard_regno_caller_save_mode):
	New function.
	* config/aarch64/aarch64.h (HARD_REGNO_CALLER_SAVE_MODE): New macro.

From-SVN: r210355
This commit is contained in:
Ian Bolton 2014-05-13 09:28:35 +00:00 committed by Ian Bolton
parent 06b9060214
commit 73d9ac6a6a
4 changed files with 33 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2014-05-13 Ian Bolton <ian.bolton@arm.com>
* config/aarch64/aarch64-protos.h
(aarch64_hard_regno_caller_save_mode): New prototype.
* config/aarch64/aarch64.c (aarch64_hard_regno_caller_save_mode):
New function.
* config/aarch64/aarch64.h (HARD_REGNO_CALLER_SAVE_MODE): New macro.
2014-05-13 Christian Bruel <christian.bruel@st.com>
* target.def (mode_switching): New hook vector.

2
gcc/config/aarch64/aarch64-protos.h
View File

@ -202,6 +202,8 @@ enum aarch64_symbol_type aarch64_classify_symbol (rtx,
enum aarch64_symbol_type aarch64_classify_tls_symbol (rtx);
enum reg_class aarch64_regno_regclass (unsigned);
int aarch64_asm_preferred_eh_data_format (int, int);
enum machine_mode aarch64_hard_regno_caller_save_mode (unsigned, unsigned,
enum machine_mode);
int aarch64_hard_regno_mode_ok (unsigned, enum machine_mode);
int aarch64_hard_regno_nregs (unsigned, enum machine_mode);
int aarch64_simd_attr_length_move (rtx);

18
gcc/config/aarch64/aarch64.c
View File

@ -424,6 +424,24 @@ aarch64_hard_regno_mode_ok (unsigned regno, enum machine_mode mode)
return 0;
}
/* Implement HARD_REGNO_CALLER_SAVE_MODE. */
enum machine_mode
aarch64_hard_regno_caller_save_mode (unsigned regno, unsigned nregs,
enum machine_mode mode)
{
/* Handle modes that fit within single registers. */
if (nregs == 1 && GET_MODE_SIZE (mode) <= 16)
{
if (GET_MODE_SIZE (mode) >= 4)
return mode;
else
return SImode;
}
/* Fall back to generic for multi-reg and very large modes. */
else
return choose_hard_reg_mode (regno, nregs, false);
}
/* Return true if calls to DECL should be treated as
long-calls (ie called via a register). */
static bool

5
gcc/config/aarch64/aarch64.h
View File

@ -824,6 +824,11 @@ do { \
#define SHIFT_COUNT_TRUNCATED !TARGET_SIMD
/* Choose appropriate mode for caller saves, so we do the minimum
required size of load/store. */
#define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \
aarch64_hard_regno_caller_save_mode ((REGNO), (NREGS), (MODE))
/* Callee only saves lower 64-bits of a 128-bit register. Tell the
compiler the callee clobbers the top 64-bits when restoring the
bottom 64-bits. */